在学习MyBatis的时候遇到了这个错误。
13:18:44.840 [Thread-0] DEBUG org.springframework.boot.devtools.restart.classloader.RestartClassLoader - Created RestartClassLoader org.springframework.boot.devtools.restart.classloader.RestartClassLoader@2d8d5fd5
13:18:45.104 [restartedMain] ERROR org.springframework.boot.SpringApplication - Application run failed
org.yaml.snakeyaml.error.YAMLException: java.nio.charset.MalformedInputException: Input length = 1
at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:218)
at org.yaml.snakeyaml.reader.StreamReader.ensureEnoughData(StreamReader.java:176)
at org.yaml.snakeyaml.reader.StreamReader.ensureEnoughData(StreamReader.java:171)
at org.yaml.snakeyaml.reader.StreamReader.peek(StreamReader.java:126)
at org.yaml.snakeyaml.scanner.ScannerImpl.scanToNextToken(ScannerImpl.java:1218)
at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:329)
at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:251)
at org.yaml.snakeyaml.parser.ParserImpl$ParseImplicitDocumentStart.produce(ParserImpl.java:214)
at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:166)
at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:156)
at org.yaml.snakeyaml.composer.Composer.checkNode(Composer.java:93)
at org.yaml.snakeyaml.constructor.BaseConstructor.checkData(BaseConstructor.java:124)
at org.yaml.snakeyaml.Yaml$1.hasNext(Yaml.java:509)
at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:199)
at org.springframework.beans.factory.config.YamlProcessor.process(YamlProcessor.java:166)
at org.springframework.boot.env.OriginTrackedYamlLoader.load(OriginTrackedYamlLoader.java:88)
at org.springframework.boot.env.YamlPropertySourceLoader.load(YamlPropertySourceLoader.java:50)
at org.springframework.boot.context.config.StandardConfigDataLoader.load(StandardConfigDataLoader.java:54)
at org.springframework.boot.context.config.StandardConfigDataLoader.load(StandardConfigDataLoader.java:36)
at org.springframework.boot.context.config.ConfigDataLoaders.load(ConfigDataLoaders.java:108)
at org.springframework.boot.context.config.ConfigDataImporter.load(ConfigDataImporter.java:132)
at org.springframework.boot.context.config.ConfigDataImporter.resolveAndLoad(ConfigDataImporter.java:87)
at org.springframework.boot.context.config.ConfigDataEnvironmentContributors.withProcessedImports(ConfigDataEnvironmentContributors.java:116)
at org.springframework.boot.context.config.ConfigDataEnvironment.processInitial(ConfigDataEnvironment.java:240)
at org.springframework.boot.context.config.ConfigDataEnvironment.processAndApply(ConfigDataEnvironment.java:227)
at org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor.postProcessEnvironment(ConfigDataEnvironmentPostProcessor.java:102)
at org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor.postProcessEnvironment(ConfigDataEnvironmentPostProcessor.java:94)
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEnvironmentPreparedEvent(EnvironmentPostProcessorApplicationListener.java:102)
at org.springframework.boot.env.EnvironmentPostProcessorApplicationListener.onApplicationEvent(EnvironmentPostProcessorApplicationListener.java:87)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131)
at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:85)
at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:66)
at java.util.ArrayList.forEach(ArrayList.java:1257)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:114)
at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:65)
at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:343)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:301)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292)
at com.zjt.demo.DemoApplication.main(DemoApplication.java:10)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)
Caused by: java.nio.charset.MalformedInputException: Input length = 1
at java.nio.charset.CoderResult.throwException(CoderResult.java:281)
at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:339)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
at java.io.InputStreamReader.read(InputStreamReader.java:184)
at org.yaml.snakeyaml.reader.UnicodeReader.read(UnicodeReader.java:125)
at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:183)
... 48 common frames omitted
Process finished with exit code 0
关键信息：org.yaml.snakeyaml.error.YAMLException: java.nio.charset.MalformedInputException，根据.yaml和.charset能够推断出是.yml文件中的编码方式出现错误。
三个.yml文件的内容分别如下：
回想到之前 application.yml 文件中上方弹出关于编码设置的选项，选了GBK，那么原因应该就是GBK和UTF-8发生冲突，导致没法对application.yml里面的中文进行正确编码吧。（可以看出自己完全不理解编码方面的知识）
因此，去掉application.yml中的中文注释之后，项目运行成功。
去查看了设置里面的编码方式，果然把application.yml的编码方式设置成了GBK，移除该配置并把所有默认编码格式改为UTF-8后问题得到解决。
至此，问题成功解决，但对编码解码，字符集，编码方式等还是非常不了解，非常需要去恶补这一块的知识，在解释错误原因的时候说得一塌糊涂，并且还需要去了解。
此外，为啥 .yml 文件总会跳出弹框让我去设置成GBK呢......
还有，项目设置中对编码方式的设置以及.yml文件中对编码方式的设置有什么不同呢？那个优先级比较高呢？是不是全都设置在.yml文件中比较好，毕竟方便到不同环境进行更改，那这样的话，应该是.yml文件的优先级更高吧......？
